@celo/wallet-hsm › "signature-utils"

Module: "signature-utils"

Index

Classes

• Signature

Variables

• publicKeyPrefix
• sixtyFour
• thirtyTwo

Functions

• bigNumberToBuffer
• bufferToBigNumber
• getAddressFromPublicKey
• makeCanonical
• recoverKeyIndex

Variables

Const publicKeyPrefix

• publicKeyPrefix: number = 4

Defined in signature-utils.ts:8

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Const sixtyFour

• sixtyFour: number = 64

Defined in signature-utils.ts:9

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Const thirtyTwo

• thirtyTwo: number = 32

Defined in signature-utils.ts:10

Functions

Const bigNumberToBuffer

▸ bigNumberToBuffer(input: BigNumber, lengthInBytes: number): Buffer

Defined in signature-utils.ts:34

Parameters:

Name	Type
input	BigNumber
lengthInBytes	number

Returns: Buffer

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Const bufferToBigNumber

▸ bufferToBigNumber(input: Buffer): BigNumber

Defined in signature-utils.ts:30

Parameters:

Name	Type
input	Buffer

Returns: BigNumber

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getAddressFromPublicKey

▸ getAddressFromPublicKey(publicKey: BigNumber): Address

Defined in signature-utils.ts:78

Parameters:

Name	Type
publicKey	BigNumber

Returns: Address

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Const makeCanonical

▸ makeCanonical(S: BigNumber): BigNumber

Defined in signature-utils.ts:18

If the signature is in the "bottom" of the curve, it is non-canonical Non-canonical signatures are illegal in Ethereum and therefore the S value must be transposed to the lower intersection https://github.com/bitcoin/bips/blob/master/bip-0062.mediawiki#Low_S_values_in_signatures

Parameters:

Name	Type
S	BigNumber

Returns: BigNumber

---

recoverKeyIndex

▸ recoverKeyIndex(signature: Uint8Array, publicKey: BigNumber, hash: Uint8Array): number

Defined in signature-utils.ts:58

Attempts each recovery key to find a match

Parameters:

Name	Type
signature	Uint8Array
publicKey	BigNumber
hash	Uint8Array

Returns: number